Learn about this topic in these articles:

Antarctica

...century, the concept arose that Antarctica is made up of two structural provinces—a long, stable Precambrian shield in East Antarctica and a much younger Mesozoic and Cenozoic mobile belt in
West Antarctica—separated by the fault-block belt, or horst, of the Transantarctic Mountains. East and
West Antarctica have come to be known respectively as the Gondwana and Andean provinces,...